Roof-type ventilation device



Nov. 13, 1962 G. M. BREIDERT ROOF-TYPE VENTILATION DEVICE 4 Sheets-Sheet 1 Filed May 15, 1959 INVENTOR. GEORGE M. BQEIDEDT BY M M ATTODNEVS Nov. 13, 1962 G. M. BREIDERT 3,063,358

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ROOF-TYPE VENTILATION DEVICE Filed May 15, 1959 4 Sheets-Sheet 3 I5 5 INVENTQR, :7 a

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ROOF-TYPE VENTILATION DEVICE Filed May 15, 1959 4 Sheets-Sheet 4 INVENTOR. 650265 M. 1525/0527 BY Mm ATTQQHEYS 3,063,358 ROOF-TYPE VENTILATIQN DEVICE George M. Breidert, Granada Hills, Qalifi, assignor to The G. C. Breidert Co., San F ernando, Calif 21 corporation oi California Filed May 15, 1959, Ser. No. 813,391 3 Claims. (CI. 98-43) This invention has to do with roof ventilators of the type which houses one or more motor-driven air irnpellers as well as the motor.

Inasmuch as such ventilators are mounted on the roofs of buildings, they are frequently exposed to high winds which tend to damage or displace them, which danger increases in proportion to the extent that the ventilators project above the top of the roof. Also, to the extent that such a ventilator projects above the roof of a building, it often interferes with the over-all architectural design of the building. It is for those as well as other reasons that those working in the ventilator art have long sought to provide ventilators of as loW a silhouette or height as is possible compatible with efficicnt operation.

Another thing which those workingin this art have sought to provide is a ventilator construction wherein the vibrations produced by operation of the motor and impellers is reduced to a minimum.

It is an object of my invention to provide a ventilator of minimum silhouette or height which is capable of housing one or more air impellers and a driving motor and which also performs with greater efiiciency than many ventilators which have objectionably high silhouettes.

More specifically, it is an object'of my invention to provide a ventilator having a louvered housing, having longitudinally spaced air impellers suspended from a resiliently mounted supporting panel and having a motor suspended from said panel in a recess between the impellers.

Another object is to provide a ventilator construction of this type in which the motor is constantly exposed to circulating air.

Another object of my invention is to provide a roof ventilator which is capable of simultaneously exhausting foul air from two separate parts of a building or of introducing fresh air into a building while exhausting foul air from the building.

Other more subordinate objects and advantages will appear hereinafter.

While I shall point out in the appended claims the features which I believe to be new, I shall now, for the purpose of enabling those skilled in the art to understand, construct, and use my invention, describe presently preferred embodiments thereof, for which purpose I shall refer to the accompanying drawing wherein:

FIG. 1 is a side elevational view;

FIG. 2 is a top plan view;

FIG. 3 is a sectional view taken on line 33 of FIG. 2;

FIG. 4 is a view taken on line 4-4 of FIG. 3;

FIG. 5 is a section taken on line 5-5 of FIG. 4;

FIG. 6 is a view taken on line 66 of FIG. 4;

FIG. 7 is a medial longitudinal sectional view showing a modified form of my invention; and

FIG. 8 is an enlarged fragmentary view partly in section and partly in elevation, taken on line 83 of FIG. 4.

Referring now to the drawing, 5 denotes a rectangular base having a depending flange 6 around its perimeter to engage over the conventional curb member, not shown, which usually surrounds the ventilation opening in a building roof, not shown.

The rectangular body 10, carried by the base, comprises hollow corner posts 15' of rectangular cross section, side and end walls 17 and louvers 18 whose ends are secured to the corner posts as by welding or in any 3,h63,358 Patented Nov. 13,, 1962 suitable manner. The louvers define air outlet passageways therebetween and the topmost of the louvers, in cooperation with the adjacent upper structure, also define an air outlet 26 from the hood 25.

The hood 25 is removably or swingably supported on the body Ill so that it may provide easy access to the interior of the body. The hood has a flat top wall 26, upwardly converging side and end walls 27 and a flat base flange 28 having a depending flange 29.

Bars 36) are struck out of side and end walls 27 of the hood and bent outwardly to provide hooded air inlet openings 31 for entry of air into the hood.

A bracket 35 is carried by each of the corner posts, upon each of which brackets a resilient rubber-like pad 36 is mounted for resiliently supporting horizontal plates 38. As best shown in FIG. 8, each bracket 35 is a flat, plate-like member secured in a cutout or recess in a corner post, as by welding.

A U-shaped motor well defining member 40 has laterally disposed top end flanges 41 secured to the inner edge portions of the plates 33.

A rectangular channel iron frame 45 is supported by the plates 33 and it is my preference to interpose resilient rubber-like pads 43 between the bottom of the frame and the plates.

A pair of channel iron cross plates 47, 48 are secured at their ends, as by welding, to the opposite sides of the frame 45 for mounting brackets 5!) carrying bearings 51 for journaling pulley shafts 53 carrying pulleys 55, 56.

A pair of centrifugal air impellers 60, 61 are secured on the shafts 53 in position beneath the respective plates 38. The bottom end of each impeller carries an inlet defining ring 64 of angled cross section providing an annular flange 65 surrounding the outlet ends of the respective orifice rings 67 whose bottom ends are secured to the base around the base inlet orifice 68. Secured to the bottom of the base in position surrounding the respective orifices 63 I provide rings 69 of angled cross section each providing an annular flange 70 to be fitted in the outlet end of an air-passing conduit 71 leading from the building being ventilated. An angle iron cross member 74 extends across the top of the frame 45 and a channel iron motor mounting bracket 75 is secured to the cros member 74. Diagonal bracing members 77 are secured at one end to the bracket 75 and secured at their other ends to the bottom surfaces of the opposite sides of the frame 45.

A motor mount 79 is secured to the bracket 75 and has a strap 80 extending in embracing relationship about a conventional electric motor M, the motor being thus suspended in a well 81 defined by the member 40 between the impellers.

The upwardly projecting motor shaft 83 carries two superimposed pulleys 84, 85 from which continuous belts 86, 87 extend about the respective pulleys 55, 56.

The hood, in conjunction with the plates 38 and member 40, defines the motor compartment 81 from which an air outlet 90 is provided around the frame 45 in communication with the air outletZtl.

In the embodiment of FIGS. 1-6 it will be observed that both the air impellers are designed and operated to withdraw air from the building through the conduits 71, which conduits may lead from different parts of the building.

In operation, the air impellers withdraw air from the building and discharge it through the outlets 19 between the louvers, and air passing outwardly over the topmost louver creates a reduced pressure at the outlet 90 to maintain circulation of air in the motor compartment.

Inasmuch as the motor is suspended between the air impellers, the over-all height of the device is reduced to a minimum, and the manner in which the frame from 3- which the motor mounting bracket is suspended is vibration-insulated by the resilient pads, causes the vibrations resulting from the operation of the motor and impellers to be damped so that those vibrations are not transferred to the building structure.

Air passing outwardly through outlet 20 is deflected by the depending flange 29, thus increasing the reduced pressure at the outlet 90. The bafi les 18 are so shaped tht eflieient operation of the ventilator is not interfered with by extraneous air currents blowing about the ventilator housing.

In the embodiment of FIG. 7 the parts are the same as in FIGS. 1-6 and are given like reference numerals, except that, instead of having both air impellers pulling air from the building, a blower fan 95 is substituted for the previously described impeller 61, so that fresh air may be drawn in between the louvers and may be forced into the building through one conduit While foul air is being withdrawn from the building through another conduit by the air impeller 60.

Here, also, the resilient pads 43 are eliminated and relatively thicker pads 36a are used in lieu of the relatively thinner pads 36 of FIGS. 1-6. Also, a dished member 97 is substituted for the corresponding plate of FIGS. 1-6.

I claim:

1. In a roof ventilator, a rectangular base, a hollow open-topped body of rectangular cross section mounted on said base and having louvers in its side walls defining air passageways therebetween, a hood of rectangular plan section mounted on the top of said body, said base having a pair of longitudinally spaced air-passing openings and carrying an upwardly disposed orifice ring surrounding each of said openings, a rectangular frame, support means resiliently supporting said frame in the upper portion of said body, said frame extending above the plane of the top of said body and being of less length and width than the interior of said body, a pair of longitudinally spaced horizontally disposed plates carried by said support means in position underlying said frame and overlying said respective openings, a pair of vertically disposed laterally spaced impeller shafts rotatably carried by said frame coaxial with said respective openings and depending through said respective plates, an air impeller secured on the bottom end of each of said impeller shafts beneath said respective plates and having annular bottom portions depending in spaced surrounding relationship to said respective orifice rings, a U-shaped wall member suspended from said plates between said impellers and defining an upwardly opening motor Well, said wall member having flange portions secured to said plates, a motor having a vertically upwardly extending shaft, means carried by said frame and supporting said motor in said well, and pulley means carried by said shafts above said frame and belt extending about said pulleys.

2. In a power-operated roof ventilator, a hollow body of rectangular horizontal section having louvers in its side and end walls defining air passages therebetween, a top closure member carried by said body, a base underlying and carried by the bottom of said body and having a pair of laterally spaced air-passing openings, a pair of air impellers, means mounting said impellers in laterally spaced relationship in said body in register with said respective openings, U-shaped wall means carried by said body between said impellers and defining an upwardly opening motor well between said impellers, said Wall means separating the interior of said body into two horizontally spaced air chambers communicating with said respective air passing openings, a motor mounted in said well, and pulley and belt means operatively connecting said motor to said respective impellers simultaneously to rotate said impellers; said base having wall portions closing the bottom portion of said body except for said air passing openings.

3. In a power-operated roof ventilator, a hollow body of rectangular horizontal section having louvers in its side and end walls defining air passages therebetween, a top closure member carried by said body, a base carried by and closing the bottom of said body and having a pair of laterally spaced air-passing openings communicating with the interior of said body, a pair of air impellers rotatably supported in said body in register with said respective openings, U-shaped wall means carried by and disposed in said body and defining an upwardly opening motor well between said impellers, a motor mounted in said Well, pulley and belt means operatively connecting said motor to said respective impellers to cause said impellers simultaneously to be rotated in relatively opposite directions in response to operation of said motor, second wall means in said body and cooperating with said well to separate the lower portion of the interior of said body into an air inlet chamber exposed to one of said impellers and an air outlet chamber exposed to the other of said impellers and means securing said second wall means to said body in position overlying said respective chambers.

References Cited in the tile of this patent UNITED STATES PATENTS 2,492,242 Shaver Dec. 27, 1949 2,582,902 Gohl Jan. 15, 1952 2,710,573 Marker June 14, 1955 2,713,301 McKann July 19, 1955 2,777,382 Solzman Jan. 15, 1957 2,830,527 Breidert Apr. 15, 1958 2,868,106 Knutson Jan. 13, 1959 

